<template>
    <div>
      <!--      面包屑导航区-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>

<!--      卡片视图区-->
      <el-card>
        <el-alert
          title="添加商品信息"
          type="info"
          show-icon
          :closable="false"
          center>
        </el-alert>
  <!--        步骤条区域-->
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success"
        align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef"
                 label-width="100px" class="demo-ruleForm" label-position="top">
        <!--        添加主体区域-->
          <el-tabs v-model="activeIndex" tab-position="left"
                   :before-leave="beforeTabLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item prop="goods_name" label="商品名称">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item prop="goods_price" label="商品价格">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item prop="goods_weight" label="商品重量">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item prop="goods_number" label="商品数量">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item prop="" label="商品分类">
                <el-cascader
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  :props="{ expandTrigger: 'hover', value: 'cat_id', label: 'cat_name', children: 'children' }"
                  @change="handleChange"></el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
              <el-form-item :label="item.attr_name" v-for="item in mamyTableData" :key="item.attr_id">
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <el-upload
                :action="uploadUrl"
                :on-preview="handlePreview"
                :on-success="handleSuccess"
                :on-remove="handleRemove"
                :headers="headerObj"
                list-type="picture">
                <el-button size="small" type="primary">点击上传</el-button>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
<!--              富文本编辑器组件-->
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <el-button @click="add" type="primary" class="addBtn">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>

<!--      图片预览对话框-->
      <el-dialog
        title="图片预览"
        :visible.sync="dialogVisible"
        width="50%">
      <img :src="imgUrl" class="showImg"></img>
      </el-dialog>
    </div>

</template>

<script>
  // 导入lodash，用于表单数据对象的深拷贝
  import _ from 'lodash'
  export default {
    name: 'Add',
    data() {
      return {
        activeIndex: '0',
        //添加商品的表单数据对象
        addForm: {
          goods_name: '',
          goods_price: 0,
          goods_weight: 0,
          goods_number: 0,
          //商品所属分类数组
          goods_cat: [],
          pics: [],
          goods_introduce: '',
          attrs: []
        },
        //添加商品的表单数据验证规则对象
        addFormRules: {
          goods_name: [
            { required: true, message: '请输入商品名称', trigger: 'blur' }
          ],
          goods_price: [
            { required: true, message: '请输入商品价格', trigger: 'blur' }
          ],
          goods_weight: [
            { required: true, message: '请输入商品重量', trigger: 'blur' }
          ],
          goods_number: [
            { required: true, message: '请输入商品数量', trigger: 'blur' }
          ]
        },
        cateList: [],
        //动态参数列表
        mamyTableData: [],
        //静态属性列表
        onlyTableData: [],

        uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',

        headerObj: {
          Authorization: window.sessionStorage.getItem('token')
        },

        imgUrl: '',
        dialogVisible: false

      }
    },
    created() {
      this.getCateList();
    },
    methods: {
      async getCateList() {
        const {data: res} = await this.$http.get('categories', {params: {type: 3}});
        if (res.meta.status !== 200) return this.$message.error('获取分类列表失败!');
        // console.log(res);
        this.cateList = res.data;
      },

      handleChange() {
        if (this.addForm.goods_cat.length !== 3) {
          this.addForm.goods_cat = [];
        }
      },
      beforeTabLeave(activeName, oldActiveName) {
        // console.log(activeName);
        // console.log(oldActiveName);
        if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
          this.$message.error('请先选择分类');
          return false;
        }
      },
      async tabClicked() {
        //动态参数面板
        if (this.activeIndex === '1') {
          const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'many'}});
          if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败!');
          // console.log(res.data);
          res.data.forEach(item => {
            item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [];
          })
          // console.log(res.data);
          this.mamyTableData = res.data;
          console.log(this.mamyTableData)
        } else if (this.activeIndex === '2') {
          const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'only'}});
          if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败!');
          // console.log(res.data);
          this.onlyTableData = res.data;
          console.log(this.onlyTableData)

        }
      },
      //图片预览
      handlePreview(file) {
        console.log(file);
        // 1、获取要预览的图片的绝对路径
        this.imgUrl = file.response.data.url;
        this.dialogVisible = true;

      },
      //监听图片成功上传
      handleSuccess(response) {
        // console.log(response);
        this.addForm.pics.push({'pic': response.data.tmp_path});
        console.log(this.addForm);
      },
      //监听移除图片
      handleRemove(file) {
        // console.log(file)
        //1、获取要删除的图片的临时路径
        const filePath = file.response.data.tmp_path;
        //2、从pics数组中，找到这个图片对应的索引值
        const i = this.addForm.pics.findIndex(x => x.pic === filePath)
        //3、调用数组splice 方法，把要删除的图片信息对象， 从pics 数组中移除
        this.addForm.pics.splice(i, 1)
      },

      //添加商品
      async add() {
        this.$refs.addFormRef.validate(valid => {
          if (!valid) return this.$message.error('请先填写必填项！');
        });

        // 处理添加商品的信息
        //如果直接将addForm.goods_cat 数组为 字符串，cascader级联选择器就会会无法正常运行，为避免这种情况，可以使用lodash 对addForm.goods_cat数组进行深拷贝，在这处理的是拷贝的数组
        const form = _.cloneDeep(this.addForm);

        form.goods_cat = form.goods_cat.join(',');
        // console.log(form)
        //处理动态参数
        // console.log(this.mamyTableData)
        this.mamyTableData.forEach(item => {
          const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals.join(' ')};
          this.addForm.attrs.push(newInfo)
        })

        //处理静态属性
        // console.log(this.onlyTableData)
        this.onlyTableData.forEach(item => {
          const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals};
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs;
        // console.log(form)

        const {data: res} = await this.$http.post('goods', form);
        if (res.meta.status !== 201) return this.$message.error('创建商品失败！');
        this.$message.success('创建商品成功！')
        //编程式路由实现跳转
        this.$router.push('/goods');
      }
    },
    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2];
        }
        return null;
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-steps {
    margin: 15px 0;
  }
  .el-checkbox {
    margin: 0 5px 0 0 !important;
  }
  .showImg {
    width: 100%;
  }
  .addBtn {
    margin-top: 15px;
  }
</style>
